CKFCar Known Faults

Vauxhall Astra Astra J 1.6 CDTi 110bhp Known Faults

1.6 CDTi 110bhp2012–2015DieselManualHatchback21 known faults

The Euro-5 CDTi is notorious for timing chain and DPF issues. One of the most complained-about UK family hatchbacks.

What To Check Before Buying

  • ✓Check service history — was oil changed regularly?
  • ✓Look for blue/black smoke on startup and under load
  • ✓Listen for rattles, knocking, or turbo whine
  • ✓Test all electrics including windows, AC, and central locking
  • ✓Check for DPF warning light or recent regenerations
  • ✓Inspect for rust underneath and around wheel arches
  • ✓Request a pre-purchase inspection by an independent mechanic

Known Faults

Timing Chain Rattle and Tensioner Failure

Critical
2012-201560,000–120,000 miles£800–£1500

The 1.6 CDTi A16DTH/DTJ engine is notorious for timing chain noise and failure, often from as low as 60,000 miles. This is the most serious known fault on the Astra J diesel.

Timing Chain Rattle (Rear Mounted)

Critical
2013-201870,000–120,000 miles£1200–£1800

The 'Whisper Diesel' 1.6 CDTi has its timing chain mounted at the rear of the engine (gearbox side). It stretches and rattles terribly.

Clutch Pedal Sticking Down

Severe
2009-201550,000–100,000 miles£150–£700

The clutch pedal fails to return to the top of its travel, often getting stuck halfway or hitting the floor completely.

DPF Blockage and Regeneration System Failure

Severe
2012-201540,000–90,000 miles£200–£1000

DPF blockage is extremely common on the Astra J 1.6 CDTi. The engine's tendency to get stuck in failed regen cycles results in diesel contaminating the engine oil — a serious secondary issue.

EGR Cooler Failure and Intake Contamination

Severe
2012-201570,000–130,000 miles£500–£800

EGR cooler failure on the Astra J 1.6 CDTi causes coolant loss and in severe cases, coolant enters the intake manifold. This is a more serious failure than a simple EGR valve block.

Turbocharger Oil Feed Pipe Failure

Severe
2012-201580,000–150,000 miles£500–£900

The oil feed pipe to the turbocharger on the Astra J 1.6 CDTi can crack or block, starving the turbo of lubrication. This leads to premature bearing failure and expensive turbo replacement.

Alternator / Smart Charge System Failure

Severe
2012-201570,000–120,000 miles£250–£450

Modern vehicles use smart charging systems to reduce engine load, but the complex regulators on the alternators frequently fail.

Starter Motor Solenoid / Brush Wear

Severe
2012-201570,000–130,000 miles£150–£350

The starter motor wears out internally. This is particularly common on vehicles equipped with Stop/Start systems.

Clutch Slave Cylinder / Concentric Bearing Leak

Severe
2012-201570,000–120,000 miles£400–£800

The concentric slave cylinder (CSC) inside the gearbox bellhousing fails, leaking hydraulic fluid and causing clutch failure.

Suspension Coil Spring Snapping

Severe
2012-201560,000–120,000 miles£150–£300

A very common MOT failure in the UK. Suspension coil springs corrode and snap, usually near the bottom pigtail.

Diesel Injector Seal Leaks

Moderate
2012-201570,000–140,000 miles£150–£300

Injector copper sealing washers on the Astra J 1.6 CDTi harden and allow combustion gases to bypass the injector seat. This causes carbonisation around the injector tops and eventually rough running.

Rear Axle Twist Beam Corrosion

Moderate
2009-20151–999,999 miles£100–£600

The rear torsion beam axle on the Astra J corrodes in the UK climate. Surface rust progresses to structural corrosion on high-mileage or older examples, and is a common MOT advisory.

Sticking Brake Calipers (Slider Pins Seized)

Moderate
2012-201540,000–100,000 miles£80–£150

The floating brake caliper design relies on sliding pins. In the UK climate, salt and water ingress cause these pins to rust and seize solid.

Wheel Bearing Wear and Drone

Moderate
2012-201550,000–110,000 miles£120–£250

Wheel bearing wear is a normal consumable on UK roads, but frequent pothole strikes accelerate the failure rate significantly.

Glow Plug Failure / Snapping in Head

Moderate
2012-201560,000–110,000 miles£100–£300

Diesel glow plugs burn out over time causing cold starting issues. The major problem is they often snap in the cylinder head when mechanics try to remove them.

Shock Absorber Oil Leak and Failure

Moderate
2012-201570,000–120,000 miles£200–£400

Shock absorbers lose their damping efficiency over time, and eventually blow their seals, leaking hydraulic fluid.

Air Conditioning Condenser Leak (Stone Damage)

Minor
2012-201540,000–120,000 miles£250–£450

The air conditioning condenser is mounted at the very front of the cooling pack, making it highly susceptible to stone damage from the road, leading to refrigerant loss.

Front Anti-Roll Bar Drop Link Wear

Minor
2012-201530,000–80,000 miles£60–£120

The front anti-roll bar drop links wear out on heavily potholed UK roads, causing an annoying knocking sound at low speeds.

Electric Window Regulator Cable Failure

Minor
2012-201550,000–120,000 miles£100–£200

The cables inside the electric window regulator mechanism fray and snap, causing the window glass to drop into the door frame.

Engine Thermostat Sticking Open

Minor
2012-201560,000–120,000 miles£100–£250

The engine coolant thermostat fails in the 'open' position. The engine never reaches its optimal operating temperature, killing fuel economy.

12V Battery Degradation and Failure

Minor
2012-201530,000–150,000 miles£80–£250

Lead-acid and AGM batteries have a finite lifespan. Modern cars are highly sensitive to voltage drops, causing bizarre electrical faults before the battery completely dies.

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